Microsoft has released System Center Essentials 2007 SP1 Upgrade

This update to System Center Essentials 2007 includes many improvements in functionality as well as an increase in the number of supported configurations.

Essentials 2007 provides a single solution with a single console for managing your servers, clients, hardware, software, and IT services for a more unified experience. This unified user experience simplifies the complexity inherent in using multiple IT management tools or tools specifically designed for Enterprise IT environments. Also, using the same central console from which you monitor your IT environment you can assess, configure and deploy updates, plus install software to groups and computers you want to target.

System Center Essentials2007 SP1 Upgrade (x64 and x86)